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What is the outcome when ClC6H4COOH is treated with concentrated H2SO4?

1. ClC6H4COOH changes to ClC6H4COCl
2. ClC6H4COOH converts into ClC6H4COCl (DDT)
3. ClC6H4COOH transforms into ClC6H4COCl (DDT) along with HCl
4. ClC6H4COOH forms ClC6H4COCl and HCl

Correct answer: ClC6H4COOH forms ClC6H4COCl and HCl

Solution

When ClC6H4COOH reacts with concentrated H2SO4, it undergoes a reaction to form ClC6H4COCl (acid chloride) along with the release of HCl as a byproduct.

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